208192971 has 32 divisors (see below), whose sum is σ = 326115328. Its totient is φ = 115668000.

The previous prime is 208192961. The next prime is 208192979. The reversal of 208192971 is 179291802.

208192971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 208192971 - 2⁷ = 208192843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (208192979) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 276846 + ... + 277596.

It is an arithmetic number, because the mean of its divisors is an integer number (10191104).

Almost surely, 2^208192971 is an apocalyptic number.

208192971 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

208192971 is a deficient number, since it is larger than the sum of its proper divisors (117922357).

208192971 is a wasteful number, since it uses less digits than its factorization.

208192971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111.

The product of its (nonzero) digits is 18144, while the sum is 39.

The square root of 208192971 is about 14428.8936166291. The cubic root of 208192971 is about 592.6823864796.

The spelling of 208192971 in words is "two hundred eight million, one hundred ninety-two thousand, nine hundred seventy-one".